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Discussion Starter #1
i have a 954 motor in my quad and it was running good till this last trip when it idles its only on 3cyl till i rev it up then it will pick up the 4th and now its bearly doing that. another problem im having is its using probibly twice as much gas as it used to. i was wondering if any of u guys have had this problem or if u know where i should look first. thanks
 

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sounds like a ignition problem check the coils and then the ecu, a service manual will walk you through the steps to check ignition. good luck :)
 

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Discussion Starter #4
thanks guys i checked the coils today and the seemed fine i also checked compression and i think im good there too. a friend told me it could be the fuel pressure regulator so i guess im gunna try that next
 

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Did you check the spark plugs and wires? Even if the plugs are still good or not they can tell you a lot just by looking at them.

Check this out. Spark Plugs -2

Basic principle of mechanical work. Look at the easy stuff and migrate to the difficult stuff. It will help troubleshoot and possibly save you lots of money.
 

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Discussion Starter #6
i pulled the plugs #1 was wet and black #2and#3 looked good and #4 was black and dry. the plugs are only a couple months old. i know the #1 plug is fouled but i took 1 of the good plugs and tested each couil and it sparked fine. im trying to figure out why that plug would foul. im thinking the fpr because of the amount of gas its using
 

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Sounds to me like the fuel pressure regulator - when my 929 had a similar problem, the regulator was bad.
 
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